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102865 (1999 WD4)
Classification: Main-belt Asteroid          SPK-ID: 2102865
[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

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Orbital Elements at Epoch 2459200.5 (2020-Dec-17.0) TDB
Reference: JPL 22 (heliocentric ecliptic J2000)
 Element Value Uncertainty (1-sigma)   Units 
e .1169721550988307 6.0663e-08  
a 2.634132265367056 1.1498e-08 au
q 2.326012137471707 1.6119e-07 au
i 11.05132662314888 6.0985e-06 deg
node 49.10117048064688 2.0877e-05 deg
peri 331.2260045877945 2.6526e-05 deg
M 14.01444379772992 1.4417e-05 deg
tp 2459139.710557654506
(2020-Oct-17.21055765)		 6.2632e-05 TDB
period 1561.546042085713
4.28		 1.0224e-05
2.799e-08		 d
yr
n .2305407527524184 1.5095e-09 deg/d
Q 2.942252393262406 1.2843e-08 au
   Orbit Determination Parameters
   # obs. used (total)      1032  
   data-arc span      7728 days (21.16 yr)  
   first obs. used      1999-11-16  
   last obs. used      2021-01-12  
   planetary ephem.      DE431  
   SB-pert. ephem.      SB431-N16  
   condition code      0  
   norm. resid. RMS      .48549  
   source      ORB  
   producer      Otto Matic  
   solution date      2021-Feb-24 08:32:38  

Additional Information
 Earth MOID = 1.33507 au 
 Jupiter MOID = 2.51208 au 
 T_jup = 3.362 
[ show covariance matrix ]

[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]

Physical Parameter Table
Parameter Symbol Value Units Sigma Reference Notes
absolute magnitude H 15.03   n/a E2021B55  

102865 (1999 WD4)          Discovered 1999-Nov-28 by Kobayashi, T. at Oizumi
Reference: 20051019/Numbers.arcLast Updated: 2005-10-26

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[ Ephemeris | Orbit Diagram | Orbital Elements | Mission Design | Physical Parameters | Discovery Circumstances | Close-Approach Data ]
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